Improvement in preserve-cans



P. H. NILES.

Fruit Can.

Patented Nov. 28, 1865.

m'fneaaess J11 vcnior;

UNITED STATES PATENT OFFICE.

PETER H. NILES, OF BOSTON, ASSIGNOR TO HIMSELF AND AUGUSTUS RUSS, OF CAMBRIDGE, MASSACHUSETTS.

IMPROVEMENT IN PRESERVE-CANS.

Specification forming part of Letters Patent No. 5 I ,264, dated November 28, 1865.

To all whom it may concern:

Be it known that I, PETER H. NILES, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Preserve-Cans, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specifition, in which Figure 1 is a perspective view of my im proved preserve-can. Fig. 2 is a vertical section through the center of the same.

Thatclass of preserve-cansin which the cover has been pressed down onto aflat rubber ring, or a rubber packing has been placed on the under side of the cover, have been objectionable, as any inaccuracy or unevenness of the bearing-surfaces would render it difficult to make a tight joint without exerting a great pressure on the cover. My invention has for its object to overcome this dit'liculty, and consists in so placing an elastic ringin the mouth of the can that the cover, which is slightly conical, shall press against the sides of the ring and thereby efl'ect a tight joint with very little pressure, and without regard to the accuracy of the beai'ingsurtaees, in combination with wedges or inclines on the cover which slide under hooks on the can and serve to hold the cover securely in place.

To enable others skilled in the art to understand and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A is the body of the can, in the upper part of which is formed agroove, a, in which is fitted an elastic packingring, D, of vulcanized rubber or other suitable material.

13 is the cover, the edge 0 of which is made slightly conical, so that when pressed into the mouth of the can against the sides of the elastic ring I), as seen in Fig. 2, a tight joint will be effected without regard to the accuracy of the bearing-surface of the cover.

The cover is pressed down firmly into the mouth of the can and against the packingring by means of wedges or inclines cl, which are forced under the hooks c on the sides of the can by turning the cover B by means of the rodf, (as seen in Fig. 1,) opehingsgbeing made in the cover to allow of its edge passing under the hooks.

In removing the cover B it is simply necessary to take hold of the rod f and turn the cover until the openings 9 in its edge are opposite to two of the hooks a, when it is free to be lifted off as required.

It will thus be seen that no pressure at all is applied to the top of the packing-ring, as heretofore, but that a tightjoint is effected by wedging the conical edge of the cover against the sides of the packingring, which requires much less pressure on the cover and less accuracy of parts than has heretofore been found necessary. There is also less liability of the cover adhering to the packing-ring, while the can is of very simple construction, and may be furnished at a low cost.

\Vhat I claim as my invention, and desire to secure by Letters Patent, as an improvement in preserve-cans, is-- The elastic packingring b, in combination with the cover B, provided with wedges or in clines d, and the hooks e, or their equivalents, operating substantially as and for the purpose set forth.

P. H. NILES,

Witnesses P. E. TEsoHEMAcHEE, N. W. STEAENs. 

